[U-Boot-Users] Booting ELDK 4.0 kernel on MPC8548CDS

[U-Boot-Users] Booting ELDK 4.0 kernel on MPC8548CDS

[Thomas Schafer]

Hi,

I'm using a MPC8548CDS eval system with u-boot 1.1.6 running on it. When
trying to boot an ELDK 4.0 kernel, the board hangs immediately after
decompression of the kernel. I've set the disable_of environment
variable to avoid usage of the flat device tree.

The same kernel boots properly when using u-boot 1.1.3 which is
delivered with the eval system.

Any hints would be appreciated.

Best regards,

Thomas Schafer

____________________________________

Kontron Modular Computers GmbH

Heinrich-Barth-Str. 1a
66115 Saarbrucken

Tel.: + 49 (0)681 / 95916 - 203
Fax:  + 49 (0)681 / 95916 - 100
E-mail: thomas.schaefer at kontron.com 

[U-Boot-Users] Booting ELDK 4.0 kernel on MPC8548CDS

[Demke Torsten-atd012]

Hi Thoomas,

I see a similar problem when using of-tree. My debugging shows
that the of-tree address given to the kernel is outside the memory
region that can be accessed by the kernel at start-up (defined
by CFG_BOOTMAPSZ), thus the kernel crashes very early without any
output.
(IMHO this is a bug.)
If you are using CONFIG_OF_FLAT_TREE _and_ "disable_of" ist likely that
you see the same behaviour, because in that case the "bootm" code
still uses the of-tree address (char *of_flat_tree), after copying the
standard bd_info data to that address.
You could check the pointer that is given to the kernel for the
board info data (line 967, parameter 1 of (*kernel) (...))
(or change (*kernel) ((bd_t *)of_flat_tree,...
to (*kernel) (kbd,...)

Regards,
Torsten


> -----Original Message-----
> From: u-boot-users-bounces at lists.sourceforge.net 
> [mailto:u-boot-users-bounces at lists.sourceforge.net] On Behalf 
> Of Thomas Schafer
> Sent: Mittwoch, 22. November 2006 19:56
> To: u-boot-users at lists.sourceforge.net
> Subject: [U-Boot-Users] Booting ELDK 4.0 kernel on MPC8548CDS
> 
> Hi,
> 
> I'm using a MPC8548CDS eval system with u-boot 1.1.6 running 
> on it. When trying to boot an ELDK 4.0 kernel, the board 
> hangs immediately after decompression of the kernel. I've set 
> the disable_of environment variable to avoid usage of the 
> flat device tree.
> 
> The same kernel boots properly when using u-boot 1.1.3 which 
> is delivered with the eval system.
> 
> Any hints would be appreciated.
> 
> Best regards,
> 
> Thomas Schafer
> 
> ____________________________________
> 
> Kontron Modular Computers GmbH
> 
> Heinrich-Barth-Str. 1a
> 66115 Saarbrucken
> 
> Tel.: + 49 (0)681 / 95916 - 203
> Fax:  + 49 (0)681 / 95916 - 100
> E-mail: thomas.schaefer at kontron.com 
> 
> --------------------------------------------------------------
> -----------
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> SourceForge.net's Techsay panel and you'll get the chance to 
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&CID=DEVDEV
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> 

[U-Boot-Users] Booting ELDK 4.0 kernel on MPC8548CDS

[Thomas Schäfer]

Hi Torsten, 

> I see a similar problem when using of-tree. My debugging 
> shows that the of-tree address given to the kernel is outside 
> the memory region that can be accessed by the kernel at 
> start-up (defined by CFG_BOOTMAPSZ), thus the kernel crashes 
> very early without any output.
> (IMHO this is a bug.)
> If you are using CONFIG_OF_FLAT_TREE _and_ "disable_of" ist 
> likely that you see the same behaviour, because in that case 
> the "bootm" code still uses the of-tree address (char 
> *of_flat_tree), after copying the standard bd_info data to 
> that address.
> You could check the pointer that is given to the kernel for 
> the board info data (line 967, parameter 1 of (*kernel) 
> (...)) (or change (*kernel) ((bd_t *)of_flat_tree,...
> to (*kernel) (kbd,...)

Thank you for the hint. As I don't want to use the of-tree, simply undefining the CONFIG_OF_FLAT_TREE switch does the job for me. The kernel is booting now.

Best regards,

Thomas

[U-Boot-Users] Booting ELDK 4.0 kernel on MPC8548CDS

[Kumar Gala]

On Nov 23, 2006, at 2:01 AM, Demke Torsten-atd012 wrote:

> Hi Thoomas,
>
> I see a similar problem when using of-tree. My debugging shows
> that the of-tree address given to the kernel is outside the memory
> region that can be accessed by the kernel at start-up (defined
> by CFG_BOOTMAPSZ), thus the kernel crashes very early without any
> output.
> (IMHO this is a bug.)
> If you are using CONFIG_OF_FLAT_TREE _and_ "disable_of" ist likely  
> that
> you see the same behaviour, because in that case the "bootm" code
> still uses the of-tree address (char *of_flat_tree), after copying the
> standard bd_info data to that address.
> You could check the pointer that is given to the kernel for the
> board info data (line 967, parameter 1 of (*kernel) (...))
> (or change (*kernel) ((bd_t *)of_flat_tree,...
> to (*kernel) (kbd,...)
>
> Regards,
> Torsten

This seems like a bug.

Looking at the code I'm confused how this works at all.  I dont see  
of_flat_tree getting setting to anything at all.

Can you guys try out Grant's patch "[PATCH] Allow CONFIG_OF_FLAT_TREE  
to boot a non-arch/powerpc kernel" and see if that fixes the issue  
when building w/CONFIG_OF_FLAT_TREE enabled.  His patch should make  
it so that a bootm w/1 or 2 args that aren't a multiimage should boot  
arch/ppc style.

- k

>> -----Original Message-----
>> From: u-boot-users-bounces at lists.sourceforge.net
>> [mailto:u-boot-users-bounces at lists.sourceforge.net] On Behalf
>> Of Thomas Schafer
>> Sent: Mittwoch, 22. November 2006 19:56
>> To: u-boot-users at lists.sourceforge.net
>> Subject: [U-Boot-Users] Booting ELDK 4.0 kernel on MPC8548CDS
>>
>> Hi,
>>
>> I'm using a MPC8548CDS eval system with u-boot 1.1.6 running
>> on it. When trying to boot an ELDK 4.0 kernel, the board
>> hangs immediately after decompression of the kernel. I've set
>> the disable_of environment variable to avoid usage of the
>> flat device tree.
>>
>> The same kernel boots properly when using u-boot 1.1.3 which
>> is delivered with the eval system.
>>
>> Any hints would be appreciated.
>>
>> Best regards,
>>
>> Thomas Schafer
>>
>> ____________________________________
>>
>> Kontron Modular Computers GmbH
>>
>> Heinrich-Barth-Str. 1a
>> 66115 Saarbrucken
>>
>> Tel.: + 49 (0)681 / 95916 - 203
>> Fax:  + 49 (0)681 / 95916 - 100
>> E-mail: thomas.schaefer at kontron.com
>>
>> --------------------------------------------------------------
>> -----------
>> Take Surveys. Earn Cash. Influence the Future of IT Join
>> SourceForge.net's Techsay panel and you'll get the chance to
>> share your opinions on IT & business topics through brief
>> surveys - and earn cash
>> http://www.techsay.com/default.php?page=join.php&p=sourceforge
> &CID=DEVDEV
>> _______________________________________________
>> U-Boot-Users mailing list
>> U-Boot-Users at lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/u-boot-users
>>
>
> ---------------------------------------------------------------------- 
> ---
> Take Surveys. Earn Cash. Influence the Future of IT
> Join SourceForge.net's Techsay panel and you'll get the chance to  
> share your
> opinions on IT & business topics through brief surveys - and earn cash
> http://www.techsay.com/default.php? 
> page=join.php&p=sourceforge&CID=DEVDEV
> _______________________________________________
> U-Boot-Users mailing list
> U-Boot-Users at lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/u-boot-users

[U-Boot-Users] Booting ELDK 4.0 kernel on MPC8548CDS

[Thomas Schäfer]

Kumar, 

> -----Original Message-----
> From: Kumar Gala [mailto:galak at kernel.crashing.org] 
> Sent: Thursday, November 23, 2006 3:52 PM
> To: Demke Torsten-atd012
> Cc: Thomas Sch?fer; u-boot-users at lists.sourceforge.net
> Subject: Re: [U-Boot-Users] Booting ELDK 4.0 kernel on MPC8548CDS
> > If you are using CONFIG_OF_FLAT_TREE _and_ "disable_of" ist likely 
> > that you see the same behaviour, because in that case the 
> "bootm" code 
> > still uses the of-tree address (char *of_flat_tree), after 
> copying the 
> > standard bd_info data to that address.
> > You could check the pointer that is given to the kernel for 
> the board 
> > info data (line 967, parameter 1 of (*kernel) (...)) (or change 
> > (*kernel) ((bd_t *)of_flat_tree,...
> > to (*kernel) (kbd,...)
> >
> > Regards,
> > Torsten
> 
> This seems like a bug.
> 
> Looking at the code I'm confused how this works at all.  I 
> dont see of_flat_tree getting setting to anything at all.
> 
> Can you guys try out Grant's patch "[PATCH] Allow 
> CONFIG_OF_FLAT_TREE to boot a non-arch/powerpc kernel" and 
> see if that fixes the issue when building 
> w/CONFIG_OF_FLAT_TREE enabled.  His patch should make it so 
> that a bootm w/1 or 2 args that aren't a multiimage should 
> boot arch/ppc style.
> 

I applied Grant's patch, I can now boot arch/ppc style (with kernel and ramdisk image) both with CONFIG_OF_FLAT_TREE defined and not defined in my board config.

Best regards,

Thomas

[U-Boot-Users] Booting ELDK 4.0 kernel on MPC8548CDS

[Dan]

Kumar Gala wrote:

[snip]
> Can you guys try out Grant's patch "[PATCH] Allow CONFIG_OF_FLAT_TREE  
> to boot a non-arch/powerpc kernel" and see if that fixes the issue  
> when building w/CONFIG_OF_FLAT_TREE enabled.  His patch should make  
> it so that a bootm w/1 or 2 args that aren't a multiimage should boot  
> arch/ppc style.
>
> - k
>   


I was having a similar problem on my MPC8555CDS,
this patch fixes the problem for me as well.

I was also having a problem with ethernet on this board. 
The TSEC driver in u-boot 1.1.6 seems to be broken
(for this board anyway).  I moved the PHY reset a bit
earlier and it fixed it for me.  I'll submit a patch in a moment.

cheers,
Dan

[U-Boot-Users] Booting ELDK 4.0 kernel on MPC8548CDS

[Kumar Gala]

Wolfgang,

Can you pickup and push Grant's patch "[PATCH] Allow  
CONFIG_OF_FLAT_TREE  to boot a non-arch/powerpc kernel".  It fixes an  
obvious bug with trying to boot use the old style boot mechanism that  
got broken with the mass of flat device tree patches.

- k

On Nov 23, 2006, at 1:38 PM, Dan wrote:

> Kumar Gala wrote:
>
> [snip]
>> Can you guys try out Grant's patch "[PATCH] Allow  
>> CONFIG_OF_FLAT_TREE  to boot a non-arch/powerpc kernel" and see if  
>> that fixes the issue  when building w/CONFIG_OF_FLAT_TREE  
>> enabled.  His patch should make  it so that a bootm w/1 or 2 args  
>> that aren't a multiimage should boot  arch/ppc style.
>>
>> - k
>>
>
>
> I was having a similar problem on my MPC8555CDS,
> this patch fixes the problem for me as well.
>
> I was also having a problem with ethernet on this board. The TSEC  
> driver in u-boot 1.1.6 seems to be broken
> (for this board anyway).  I moved the PHY reset a bit
> earlier and it fixed it for me.  I'll submit a patch in a moment.
>
> cheers,
> Dan

[U-Boot-Users] Booting ELDK 4.0 kernel on MPC8548CDS

[Jon Loeliger]

On Fri, 2006-11-24 at 09:19, Kumar Gala wrote:
> Wolfgang,
> 
> Can you pickup and push Grant's patch "[PATCH] Allow  
> CONFIG_OF_FLAT_TREE  to boot a non-arch/powerpc kernel".  It fixes an  
> obvious bug with trying to boot use the old style boot mechanism that  
> got broken with the mass of flat device tree patches.
> 
> - k

Yeah, that's the patch that I ACK'ed on 2-Nov-06 as well.

Thanks,
jdl